All of the following expressions have the same value, when x = -2 and y = 4, except . -2 xy
-4 x 2
x 2y
(-2) 2y

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

(x-5)1/2+5=2 what is a possible solution?

50 points~ ! i have to turn this in tomarrow